Steam-boiler



UNITED STATES PATENT OFFICE.

ANDRIAN I. BAR-RANOFF, OF BANGOR, MAINE.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 398,116, dated February 19, 1889.

Application filed July 2OI 1888. Serial No. 280,479- (No model.)

To all whom it 71mg concern;

Be it known that I, ANDRIAN I. BARRAN- OFF, a citizen of the United States, residing at Bangor, in the county of Penobscot and State of Maine, have invented certain new and useful Improvements in Steam-Boilers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

This invention relates to steam-boilers, locomotive, stationary, or marine; and it consists in the arrangement of certain. pipes and other co-operating parts, by which the circulation in the boiler is increased and the generation of steam to a working pressure is more speedily attained, all substantially as hereinafter more particularly set forth and claimed.

The drawings accompanying this specification represent in Figure 1 an end elevation of a boiler embodying my invention, the end plate being removed. Fig. 2 is a sectional elevation longitudinally of a portion of a boiler to which my improvements are applied. Fig. 3 is a section on line 03 0c in Fig. 1, showing the arrangement of pipes at the point where the injectors are located.

In said drawings I have shown an annular 'tubular boiler, 2, one of that class in which the grate-bars 3 are within the shell of the boiler, while the water-space of the latter surrounds the fire. Horizontal t-ubular flues 4 4 are disposed in the usual manner longitudinally therein, and serve to conduct away the hot gases and other products of combustion through the boiler, as indicated by the arrows, whence they escape by way of the smokestack or bonnet 5.

The object of my invention, as before alluded to, is to increase the circulation. To this end I have arranged in duplicate a system of circulating or coil pipes, 6 6; but as they are alike in structural arrangement and function I shall proceed to describe the opera tion of a single one. The boiler 2 is annular, composed of two shellsthe outer one, 7, and the inner, 8. The latter in the present instance is eccentrically disposed, as shown, in order to bring the major portion of the water-space 9 above the fire. Through said water-space 9 extend the tines 4 4:, before premised At the rear end of the upper water-space,

I and adjacent to the inner shell, 8, (see Fig. 2,)

I have secured to the boiler-head one end of the pipe 6, which is continuous and extends horizontally forward in close proximity to the bridge-wall 10, and being designated at 12. Furthermore, said pipe is coiled or extended in the rear of the bridge-wall by short vertical lengths to produce a large amount of heating-su rface within a small space, and is finally united to the outer shell, 7, by the pipe 13, located in a closed chamber, 14, formed by a jacket, 15, so called, made of cast-iron and secured exteriorly to the boiler-shell at this point. The effect of this pipe or a series of similar pipes is to increase the circulation in the boiler. hen the latter is in active service, the hot gases passing over the bridgewall 10 superheat that portion 12 of the pipe 6 in proximity thereto, and since said portion 12 is near the upper water-surface the superheated water naturally passes into the boiler, while an equal quantity emerges from the lower water-space and flows up in the pipe 6. The circulation is accelerated by the length of the pipes 6, whereby a greater heating-surface is presented and the waste heat utilized.

To still further increase the circulation and render it stronger and more rapid, I have located an injector, 16, at the junction of the pipe 13, leading from the boiler, with the.

lower end of the circulating-pipe 6. From the top of the boiler is led a pipe, 17, which is located in the chamber 14, formed between the outer shell, 7, of the boiler and the jacket This pipe is connected with and feeds the injector 16, while a waste-pipe, 18, which may return to the boiler condense steam from any source, also terminates at the end of the circulating-pipe 6, and is emptied by aid of the injector.

The object of the injector is more readily understood when the boiler has just commenced to make steam, since the latter is first generated above in the steam-space, whence it passes through the pipe 17, and, meeting with the cooler \vate r in the lower water-space, is partially condensed, and thereby induces an upward flow or current through the pi pcs 1-) 1S and coil-pipe (i. A great]y-increased circulation is produeedinuch more so than that produced by the natural rise of the warmer water, ordinarily very slow;

To prevent the hot gases and heat derived therefrom from burning out the upper part of the boiler-hezn'hl have disposed a wall or partition,19,eon'1posed oi some good non'eonductor of heat, as fire-ln-iek. This wall rests upon proper supports and extends from the boiler-head to the rear end plate, (see Fig. 2,) and is situated about on a plane with the normal water-level. In the chamber so formed is located the feed-pipe 90 of the boiler, provided in that portion within the boiler with tine holes, by which the feed-water is to be delivered in the form of spray.

The o ieration is as follows, presuming the boiler has just been fired: The circulatingpipes i '|,which contain only a small amount of water, soon become heated, as also the water therein-the latter much more rapidly than in the. boiler proper. This water at once escapes upwardly through the coil-pipes 6, while a general eireulation is at once produced throughout the boiler. lm'meiiliately upon production oiTsteam the latter enters the pipes 17 to the injectors, and the circulation is still more accelerated by their activity; hence the working pressure in the boiler is much more quickly obtained.

hat I desire to claim is 1. In an annular boiler, as described, the combination, with said boiler 2, its ilues l- 4-, the bridge-wall 10 interiorly thereof, and the circulating-pipe 6, which connects the upper and lower water-spaces, and having the horizontal extension 12 in rear of and above the bridge-wall, of the injector 16 and its steampipe 17, substantially as specified.

2. The combination ,with the boiler 2, bridgewall 10, the circulating-pipes 6 in rear thereof, which connect the upper and lower waterspaecs, and the injectors 16, co-operatin with said circulatingpipcs, oil the jacket 15 and the steam-pipes l7 exteriorly of the boiler, each of which supplies an injector, t'or purposes substantially as herein set forth.

3. The boiler 2, provided with the tines 41 4-, bridge-wall 10, partition 11), and jacket 15, combined with the steam-pipes 17, leading from the steam-space and exteriorly of the boiler to the injectors, and the circulatingpipes 0, which connect the lower and upper water-spaces of said boiler, substantially as herein set forth.

In testimony hereof I al'iix my signature in presence ot. two witnesses.

ANDRTAN 1. BAR HA X01 1".

\Vitnesses:

ALBlON VEAZIE, JOHN C. W1 LSON. 

